/*
 * Copyright (C) 2021 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.sentry.spring.boot;

import com.jakewharton.nopen.annotation.Open;

import io.sentry.IHub;
import io.sentry.spring.tracing.SentrySpanClientHttpRequestInterceptor;

import java.util.ArrayList;
import java.util.List;

import org.jetbrains.annotations.NotNull;
import org.springframework.boot.web.client.RestTemplateCustomizer;
import org.springframework.http.client.ClientHttpRequestInterceptor;
import org.springframework.web.client.RestTemplate;

/**
 * SentrySpanRestTemplateCustomizer
 *
 * @since 2021-07-29
 */
@Open
class SentrySpanRestTemplateCustomizer implements RestTemplateCustomizer {
    private final @NotNull SentrySpanClientHttpRequestInterceptor interceptor;

    SentrySpanRestTemplateCustomizer(final @NotNull IHub hub) {
        this.interceptor = new SentrySpanClientHttpRequestInterceptor(hub);
    }

    @Override
    public void customize(final @NotNull RestTemplate restTemplate) {
        final List<ClientHttpRequestInterceptor> existingInterceptors = restTemplate.getInterceptors();
        if (!existingInterceptors.contains(this.interceptor)) {
            final List<ClientHttpRequestInterceptor> interceptors = new ArrayList<>();
            interceptors.add(this.interceptor);
            interceptors.addAll(existingInterceptors);
            restTemplate.setInterceptors(interceptors);
        }
    }
}
